Wolfram Demonstrations Project

This Demonstration shows how to fold a trapezoid into a rectangle.

In [1], this transformation is called a tube-cyclic dissection of a trapezoid to a rectangle.

Reference

[1] G. N. Frederickson, Piano-Hinged Dissections, Wellesley, MA: A. K. Peters, 2006 pp. 50–51.

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Folding a Trapezoid into a Rectangle